水厂取水工程明渠排砂设计

Design of Silt Removal from Open Channel of Intake Works of Waterworks

针对某水厂取水口淤砂严重的问题,对取水口进行了改进设计。由于河道底部平坦,无法利用上下游高程差进行排砂,因此设计采用机械排砂方式,即在渠道内均布几排水下推进器。设计中通过计算排砂流速及明渠内的阻力损失确定了所需推进器的数量及参数,保证了取水口的正常运行。

Aimed at the problem of grave silting in the water intake of a waterworks, the design of water intake was improved. Because of the smooth channel bottom, silt cannot be removed by gravitation. The mechanical silt removal mode was designed, that is, equal setting of some rows of underwater pushers in the channel. In the design, the number and parameters of pushers were determined by calculating silt removal velocity and resistance loss in the channel, ensuring the normal operation of the water intake.